Finding the Fourth Proportional to 139,072.77, 208,556.78 and 50,304.33

Step by Step Solution

1. Step 1: Write the proportion equation
   139,072.77 : 208,556.78 = 50,304.33 : x
2. Step 2: Convert to fraction form
   139,072.77/208,556.78 = 50,304.33/x
3. Step 3: Cross multiply
   139,072.77x = 208,556.78 × 50,304.33
4. Step 4: Simplify right side
   139,072.77x = 10,491,308,833.34
5. Step 5: Solve for x
   x = 10,491,308,833.34/139,072.77
6. Step 6: Final answer
   x = 75,437.55